Introduction The instrument applies to the color quality control, color difference control, color difference analysis, sampling testing and online testing for industries as textile, printing and dyeing, garments, shoes, leather, chemical, plastic, pigment, paint, ink, printing, metal, photography and toys etc., as well as to the auxiliary color matching during the processes as injection, inking, painting and spraying coating etc. Aperture 8mm version is a general-purpose color difference meter, mostly used on flat surface materials. It provides great convenience and trustworthy reliability for its versatility, tiny table difference and stability. Specification Model WR-10 Color Space CIELAB Color Difference Formula E*ab Aperture 8mm Illumination Condition CIE Recommendation：8/d Light Source D65 Sensor Photodiode array Observer CIE 10 Standard observer Wavelength: 400nm-700nm; Interval: 10nm Reflectivity: 0-200%; Resolution: 0.01% Measurement Range L: 0 to 100 Repeated Accuracy E